Process for producing an energy absorbing panel
CA 2115552 C · Owner: Kerman, Michael L. · Inventors: Kerman, Michael L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing an energy absorbing panel having at least one energy absorbing surface in a mold comprising an upper mold and a lower mold. The process comprising placing a reinforcing layer in at least one of the upper mold and the lower mold. A liquid foamable polyurethane composition is then dispensed in the lower mold. The upper mold and lower mold are closed to define an enclosure corresponding substantially to the energy absorbing panel the liquid foamable polyurethane composition is expanded to fill substantially the enclosure to produce a resilient polyurethane foam core which adheres to the reinforcing layer thereby providing an energy absorbing surface. The reinforcing …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed August 12, 1992 and granted March 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 12, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.